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Uzi Tools
49 Free Tools Available

All Free Online Calculators & Utilities

Browse our complete collection of free online calculators and utilities. Everything runs in your browser with complete privacy.

Finance & Budgeting Tools & Calculators

Free online calculators for mortgages, investments, retirement, budgets, and more. Browser-based and available without an account.

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Mortgage Payment Calculator

Estimate monthly mortgage payments with principal, interest, taxes, and insurance.

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Compound Interest Calculator

Calculate savings growth with compound interest, recurring contributions, and different compounding frequencies.

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SIP Returns Calculator

Estimate the future value of monthly SIP investments from an assumed annual return and time period.

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Retirement Savings Calculator

Estimate the monthly savings needed to reach a retirement goal from your current savings and assumptions.

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Paycheck & Net Salary Calculator

Estimate take-home pay and net salary from gross income, pay frequency, taxes, and deductions.

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Debt Payoff Calculator

Compare debt snowball and avalanche payoff plans using balances, rates, minimums, and extra payment.

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Health & Fitness Tools & Calculators

Free health calculators for BMI, BMR, TDEE, body fat, calories, water, sleep, ideal weight, and pregnancy planning. Browser-based and free to use.

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BMI Calculator

Calculate Body Mass Index from height and weight and see the adult reference category.

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BMR & TDEE Calculator

Estimate basal metabolic rate, total daily energy expenditure, and activity-adjusted calorie needs.

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Body Fat Percentage Calculator

Estimate body fat percentage from height, waist, neck, and hip measurements using the US Navy method.

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Daily Calorie Calculator

Estimate calorie targets for maintenance, weight loss, or weight gain from body metrics and activity.

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Water Intake Calculator

Estimate daily fluid needs from body weight and activity level, with results in liters and cups.

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Sleep Cycle Calculator

Calculate suggested bedtimes or wake times from 90-minute sleep cycles and sleep-onset time.

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Education & Everyday Tools & Calculators

Free online tools: age on planets, days alive, clothing size conversion, grade/GPA, reading speed, tip and bill split. No signup, all in your browser.

Age on Planets Calculator

Calculate your age in days and compare your age on Mercury, Venus, Mars, and other planets.

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Clothing Size Converter

Compare common US, UK, and EU clothing and shoe sizes as a shopping reference.

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GPA Calculator

Calculate a weighted GPA from grades and credits, or find the grade needed for a target GPA.

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Reading & Typing Speed Calculator

Calculate reading or typing speed in words per minute, or estimate time from word count and WPM.

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Tip & Bill Split Calculator

Calculate tip percentage, total bill amount, and split the cost per person for any restaurant meal.

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Converters & Calculators Tools & Calculators

Free online converters for number bases, units, data sizes, date/time, and Roman numerals. No signup, all in your browser.

Number Base Converter

Convert values between binary, octal, decimal, and hexadecimal number bases.

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Unit Converter

Convert common length, weight, temperature, and volume units between metric and imperial systems.

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Data Size Converter

Convert bits, bytes, decimal KB/MB/GB, and binary KiB/MiB/GiB without mixing conventions.

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Date Difference Calculator

Find the days between two dates or add and subtract a number of days from a date.

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Roman Numeral Converter

Convert standard numbers to Roman numerals and Roman numerals to numbers with this translator tool.

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Home, Auto & DIY Tools & Calculators

Free online calculators for paint coverage, concrete volume, tire sizes, auto loans, solar savings, and landscaping. No signup, all in your browser.

Paint Coverage Calculator

Estimate gallons of paint for walls, rooms, and ceilings, including openings and multiple coats.

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Concrete Calculator

Estimate concrete volume in cubic feet, cubic yards, and common premixed bag sizes.

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Tire Size Calculator

Compare tire sizes, overall diameter, sidewall height, circumference, and speedometer difference.

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Car Loan vs Lease Calculator

Compare estimated monthly payments and total out-of-pocket costs for a car loan and a lease.

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Solar Panel ROI Calculator

Estimate solar savings, payback period, and return on investment from installation and energy assumptions.

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Mulch & Soil Calculator

Estimate mulch, topsoil, or gravel in bags and cubic yards from area and depth.

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Math & Statistics Tools & Calculators

Free math calculators for algebra, geometry, probability, statistics, and calculus. Solve equations, graph functions, and explore formulas in your browser.

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Online Graphing Calculator

Plot one-variable functions on a 2D coordinate plane over a chosen x range.

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Quadratic Equation Solver

Solve ax² + bx + c = 0 and see real or complex roots with step-by-step breakdown.

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Linear Regression Calculator

Fit a least-squares line to paired x and y data and see slope, intercept, correlation, and R².

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Bayes' Theorem Calculator

Compute posterior probabilities from prior and likelihood values using Bayes' theorem.

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Permutation & Combination Calculator

Compute nPr and nCr for counting arrangements and selections in probability problems.

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Prime Factorization Calculator

Factor any positive integer into its prime factors and see the product form.

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